Bug 221843 – REGRESSION (r272784): [macOS Release] fast/animation/request-animation-frame-throttling-lowPowerMode.html is a flaky failure

• Component: New Bugs
• Status: RESOLVED FIXED

[Ryan Haddad]

fast/animation/request-animation-frame-throttling-lowPowerMode.html has recently become a flaky failure on macOS release bots;

--- /Volumes/Data/slave/bigsur-release-tests-wk2/build/layout-test-results/fast/animation/request-animation-frame-throttling-lowPowerMode-expected.txt
+++ /Volumes/Data/slave/bigsur-release-tests-wk2/build/layout-test-results/fast/animation/request-animation-frame-throttling-lowPowerMode-actual.txt
@@ -3,7 +3,7 @@
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-PASS framesPerSecond < 35 is true
+FAIL framesPerSecond < 35 should be true. Was false.
 PASS successfullyParsed is true
 
 TEST COMPLETE

https://results.webkit.org/?suite=layout-tests&test=fast%2Fanimation%2Frequest-animation-frame-throttling-lowPowerMode.html

[Radar WebKit Bug Importer]

<rdar://problem/74290541>

[Ryan Haddad]

It looks like this test first failed with r272702 and r272703, then passed consistently until r272784.

r272705 was a revert of r272702, which was re-landed in r272784.

I haven't confirmed locally, but this suggests that r272784 is indeed the regression point.

[Alex Christensen]

Created attachment 420189 [details]
Patch

[Alex Christensen]

r272824